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Finding the Fourth Proportional to 2,108.95, 3,163.83 and 810.32

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Solution

The fourth proportional to 2,108.95, 3,163.83 and 810.32 is: 1,215.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.95 : 3,163.83 = 810.32 : x
  2. Step 2: Convert to fraction form
    2,108.95/3,163.83 = 810.32/x
  3. Step 3: Cross multiply
    2,108.95x = 3,163.83 × 810.32
  4. Step 4: Simplify right side
    2,108.95x = 2,563,714.73
  5. Step 5: Solve for x
    x = 2,563,714.73/2,108.95
  6. Step 6: Final answer
    x = 1,215.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.